The LM5145RGYR 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components.
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Apr 6, 2022
Hilda Malory
The LM5145RGYR 75-V synchronous buck controller regulates from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. This article will unlock more of its datasheet, pinout, feature, and application circuit about LM5145RGYR.
LM5145RGYR
LM5145RGYR Pinout
Symbol
LM5145RGYR Symbol
Footprint
LM5145RGYR Footprint
3D Model
LM5145RGYR 3D Model
The LM5145RGYR 75-V synchronous buck controller regulates from a high input voltage source or a high voltage transient-prone input rail, reducing the need for external surge suppression components. Large step-down ratios are enabled by a high-side switch minimum on-time of 40 ns, allowing direct step-down conversion from a 48-V nominal input to low-voltage rails for decreased system complexity and solution cost.
The LM5145RGYR operates at approximately 100% duty cycle with input voltage dips as low as 6 V, making it a great choice for high-performance industrial control, robotics, datacom, and RF power applications.
• Versatile synchronous buck DC/DC controller
• Switching frequency from 100 kHz to 1 MHz
• 7.5-V gate drivers for standard VTH MOSFETs
• Fast line and load transient response
• Inherent protection features for robust design
• 20-pin VQFN package with wettable flanks
The LM5145RGYR is a 75-V synchronous buck controller with all of the functions necessary to implement a high-efficiency step-down power supply. The output voltage range is from 0.8 V to 60 V. The following figure shows the functional block diagram of LM5145RGYR.
LM5145RGYR Functional Block Diagram
• Remote radio unit (RRU) and BTS
• Networking and computing power
• Non-isolated PoE and IP cameras
• Industrial motor drives
Circuit 1 shows the schematic diagram of a 5-V, 20-A buck regulator with a switching frequency of 230 kHz
Application Circuit 1 With LM5145 48-V to 5-V, 20-A Buck Regulator at 230 kHz
Circuit 2 shows the schematic diagram of a 400-kHz, 12-V output, 10-A synchronous buck regulator intended for RF power applications.
Application Circuit 2 With LM5145 48-V to 12-V Synchronous Buck Regulator at 400 kHz
Circuit 3 shows the schematic diagram of a 150-W, regulated 24-V buck regulator for commercial drone applications with an output voltage tracking feature.
Application Circuit 3 With LM5145 48-V to 24-V Buck Regulator at 440 kHz
Circuit 4 shows the schematic diagram of a 10-A synchronous buck regulator for a DSP core voltage supply.
Application Circuit 4 With LM5145 DSP Core Voltage Supply
LM5145RGYR Package
Texas Instruments LM5145RGYR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM5145RGYR.
| Product Attribute | Attribute Value | |
|---|---|---|
| Lifecycle Status | ACTIVE (Last Updated: 3 days ago) | |
| Factory Lead Time | 6 Weeks | |
| Mounting Type | Surface Mount, Wettable Flank | |
| Package / Case | 20-VFQFN Exposed Pad | |
| Surface Mount | YES | |
| Number of Pins | 20Pins | |
| Operating Temperature | -40°C~125°C TJ | |
| Packaging | Tape & Reel (TR) | |
| JESD-609 Code | e3 | |
| Pbfree Code | yes | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) | |
| Number of Terminations | 20Terminations |
| Product Attribute | Attribute Value | |
|---|---|---|
| Terminal Finish | Matte Tin (Sn) | |
| Additional Feature | ADJUSTABLE OUTPUT VOLATGE RANGE FROM 0.8 TO 60V | |
| Terminal Position | QUAD | |
| Terminal Form | NO LEAD | |
| Base Part Number | LM5145 | |
| Function | Step-Down | |
| Number of Outputs | 1Output | |
| Output Type | Transistor Driver | |
| Input Voltage-Nom | 48V | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Output Configuration | Positive | |
| Voltage - Supply (Vcc/Vdd) | 6V~75V | |
| Control Features | Enable, Frequency Control, Power Good, Soft Start |
| Product Attribute | Attribute Value | |
|---|---|---|
| Input Voltage (Min) | 6V | |
| Topology | Buck | |
| Control Mode | VOLTAGE-MODE | |
| Frequency - Switching | 100kHz~1MHz | |
| Input Voltage (Max) | 75V | |
| Control Technique | PULSE WIDTH MODULATION | |
| Synchronous Rectifier | Yes | |
| Duty Cycle (Max) | 100% | |
| Height | 1mm | |
| Length | 4.5mm | |
| Width | 3.5mm | |
| Thickness | 900μm | |
| RoHS Status | ROHS3 Compliant |
Download datasheets and manufacturer documentation for LM5145RGYR
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